<template>
  <div>
    <!-- 面包屑导航栏 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->
    <el-card class="box-card">
      <!-- 添加按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column label="明细" type="expand" width="50px">
          <template slot-scope="scope">
            <!-- 渲染一级权限 -->
            <el-row v-for="(item1, index1) in scope.row.children" :key="item1.id" :class="{ borderbottom: true, bordertop: index1 == 0, vcenter: true, row: true }">
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <el-col :span="19">
                <el-row v-for="(item2, index2) in item1.children" :key="item2.id" :class="{ bordertop: index2 != 0, vcenter: true }">
                  <el-col :span="6">
                    <el-tag closable type="success" @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3, index3) in item2.children" :key="item3.id" closable type="warning" @close="removeRightById(scope.row, item3.id)">{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column label="序号" type="index" width="50px"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)"></el-button>
            <el-tooltip effect="dark" content="分配权限" placement="top" :enterable="false">
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="showRightDialog(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 添加角色对话框 -->
      <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="30%" @close="addDialogClosed">
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px" class="demo-ruleForm">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑角色对话框 -->
      <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="30%" @close="editDialogClosed">
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px" class="demo-ruleForm">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRole">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 分配权限对话框 -->
      <el-dialog title="分配权限" :visible.sync="rightDialogVisible" width="30%" @close="rightDialogClosed">
        <el-tree ref="treeRef" :data="rightsList" :props="treeProps" node-key="id" show-checkbox default-expand-all :default-checked-keys="defaultKeys"></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="rightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRight">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 添加
      rolesList: [],
      addDialogVisible: false,
      addForm: {
        roleName: '',
        roleDesc: '',
      },
      addFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }],
      },

      // 编辑
      editDialogVisible: false,
      editForm: {},
      editFormRules: {
        roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }],
        roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }],
      },

      // 分配权限
      rightDialogVisible: false,
      rightsList: [],
      // 树形组件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children',
      },
      // 角色拥有的第三层权限的id列表
      defaultKeys: [],
      roleId: '',
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 添加角色的功能
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolesList = res.data
    },
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    addRole() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败！')
        }
        this.addDialogVisible = false
        this.getRolesList()
        this.$message.success('添加角色成功！')
      })
    },

    // 编辑角色的功能
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败！')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    editRole() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) {
          return
        }
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc,
        })
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色失败！')
        }
        this.editDialogVisible = false
        this.getRolesList()
        this.$message.success('修改角色成功！')
      })
    },

    // 删除角色
    removeRoleById(id) {
      this.$confirm('确定删除该角色吗？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(async () => {
          const { data: res } = await this.$http.delete('roles/' + id)
          if (res.meta.status !== 200) {
            return this.$message.error('删除角色失败！')
          }
          this.getRolesList()
          this.$message.success('删除角色成功！')
        })
        .catch(() => {
          this.$message.info('已取消删除')
        })
    },

    // 删除权限
    removeRightById(role, rightId) {
      this.$confirm('确定删除该权限吗？', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning',
      })
        .then(async () => {
          const { data: res } = await this.$http.delete('roles/' + role.id + '/rights/' + rightId)
          if (res.meta.status !== 200) {
            return this.$message.error('删除权限失败！')
          }
          role.children = res.data
          this.$message.success('删除权限成功！')
        })
        .catch(() => {
          this.$message.info('已取消删除')
        })
    },

    // 分配权限
    async showRightDialog(role) {
      const { data: res } = await this.$http.get('rights/tree')
      this.rightsList = res.data
      this.getDefaultKeys(role)
      this.roleId = role.id
      this.rightDialogVisible = true
    },
    getDefaultKeys(node) {
      // 第三层
      if (!node.children) {
        return this.defaultKeys.push(node.id)
      }
      // 非第三层
      node.children.forEach((item) => {
        this.getDefaultKeys(item)
      })
    },
    rightDialogClosed() {
      this.defaultKeys = []
    },
    async allotRight() {
      const keys = this.$refs.treeRef.getCheckedKeys().concat(this.$refs.treeRef.getHalfCheckedKeys())
      const idStr = keys.join(',')

      const { data: res } = await this.$http.post('roles/' + this.roleId + '/rights', {
        rids: idStr,
      })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.rightDialogVisible = false
      this.getRolesList()
      this.$message.success('分配权限成功！')
    },
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 6px;
}
.borderbottom {
  border-bottom: 1px solid #eee;
}
.bordertop {
  border-top: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
.row {
  margin-left: 60px;
  margin-right: 60px;
}
</style>
